Map client holes fix

* fixes bug where holes in stored geometries would not be rendered properly on initial loading the map client
    * drawback: multiple polygons are treated as a single feature on the map client. Not a real issue but maybe we can find a better solution to this
* quality of life: renders geometry area in m² on detail and report view

konova/models/geometry.py

@@ -213,12 +213,9 @@ class Geometry(BaseResource):
             geojson (dict): The FeatureCollection json (as dict)
         """
         geom = self.geom
-        geom.transform(ct=srid)
+        if geom.srid != srid:
+            geom.transform(ct=srid)
 
-        polygons = []
-        for coords in geom.coords:
-            p = Polygon(coords[0], srid=geom.srid)
-            polygons.append(p)
         geojson = {
             "type": "FeatureCollection",
             "crs": {
@@ -230,8 +227,8 @@ class Geometry(BaseResource):
             "features": [
                 {
                     "type": "Feature",
-                    "geometry": json.loads(x.geojson)
-                 } for x in polygons
+                    "geometry": json.loads(geom.json),
+                 }
             ]
         }
         return geojson